Insulating support



Oct. 27, 1936. J TAYLOR 2,058,643

INSULATING SUPPORT Filed Jan. 30, 1956 Inventor Attorney John J 7Zzg/or- Patented Oct. 27, 1936 UETE STATES PATENT OFFIQE.

INSULATING SUPPORT Application January 30, 1936, Serial No. 61,511

15 Claims.

ihis invention relates to insulating pedestals or stacks for supporting electrical apparatus, such as switch terminals, and has for one of its objects the provision of an insulating stack which may be readily formed from standard insulator units; which will occupy a minimum of space for the required strength; which will be of rigid construction to withstand bending and torsion moments and which shall be of improved construction and operation.

Other objects and advantages will appear from the following description.

The invention is exemplified by the combination and arrangement of parts shown in the accompanying drawing and described in the following specification, and it is more particularly pointed out in the appended claims.

In the drawing:

Fig. l is a top plan View with parts broken away showing a disconnecting switch and embodying one form of the present invention.

Fig. 2 is elevation of the switch shown in Fig. 1.

In the drawing the numeral l5] designates a pair of spaced beams forming the base for an electrical switch and at each end of the base is supported an insulating pillar, each pillar formed of two inclined stacks ii and I2 and a vertical stack is, each stack being formed of porcelain units it connected together by metal fittings l5. The stacks are preferably composed of sections, the sections being connected by post and cap fittings l6 and Ill secured together by bolts 58.

Interposed between the post and cap fittings l8 and ii of the sections of inclined stacks H and 52 are channel bars 59 which connect the inclined stacks IE and i2, thus forming a rigid structure which resists torsion and bending moments. A cross bar it connects the upper ends of the inclined stacks ill and iii and is provided with angular fittings 2i at each end to fit the caps on the upper ends of the stacks H and I2 and to provide a horizontal top surface for the plate 29. Mounted on the upper surface of the plate 20 is a gear boX 22 in which is journalled a shaft 23 secured to the upper end of the perpendicular stack iii. A shaft 2 1 is secured to the lower end of the stack I3 and is journalled in a suitable cross bar on the base l0. Any suitable means may be employed for rotating the shaft 24 and consequently the stack 13.

Any suitable operating mechanism may be mounted in the housing 22 for operating a switch blade 25. In the form shown, the blade is secured to a transverse shaft 26, carrying a gear sector 21 which meshes with a worm 28 fixed to the shaft 23. The shafts 23 and 24 are provided with suitable end thrust bearings so that the stack l3 forms a brace for the stacks II and I2 and the three stacks, together with their transverse bracing, form a rigid tripod for resisting bending moments in all directions as well as torsion.

The parallel arrangement of the inclined stacks H and I2 makes it possible to connect the two stacks with braces at right angles to the axes of the stacks so that the fittings are much less complicated than would be the case if the two stacks II and 62 came together at the top of the pedestal. The arrangement also provides a better arrangement for supporting the housing 22 at the top of the pedestal since the housing can be mounted at a point on the plate 20 removed from its connection with the upper ends of the two stacks.

Since the upper ends of the inclined stacks i! and I2 can be spaced outwardly from the upper end of the vertical stack l3, a much simpler fitting can be used at the top of the vertical stack to provide for rotation of the stack to operate the switch. The two parallel stacks ii and I2 connected by rigid cross braces we provide a structure which is rigid against transverse bending moments and the inclination of the stacks gives adequate bracing against forces acting in a horizontal direction parallel with the base Hi. It will be seen that the cross bars 19, as well as the insulators of the stacks ll and I2, avoid danger of shorts due to drip water since they are offset horizontally relative to one another and consequently drip water from one will not strike another lower down in the stack.

While the pedestal is shown supporting the terminals of a switch, it will be understood that it can also be used for supporting various forms of electrical apparatus, such as bus bars, conductor supports and other devices that are carried on insulating posts or pedestals.

I claim:

1. An insulating pedestal comprising a pair of elongated insulating members disposed parallel to each other, cross braces rigidly connecting said elongated members, and a third elongated insulating member connected to one of said cross braces and disposed at an angle to the plane of said first-named pair.

2. An insulating support comprising a base, a pair of elongated insulating members mounted on said base and disposed parallel to each other, a fitting connecting said insulating members at a point spaced from said base, and a third elongated insulating member interposed between said base and fitting and disposed at an angle to the plane of said first-named pair.

3. An insulating support comprising a base, a pair of insulator stacks mounted on said base, each stack comprising a plurality of insulator units rigidly connected together, said stacks being disposed parallel to each other, a fitting connecting said stacks at a point spaced from said base, and a third stack of insulator units rigidly connected together and interposed between said base and fitting and acting as a. brace for said parallel stacks.

4. An insulator support comprising a base, a pair of elongated insulating members mounted on said base and arranged parallel to each other and at an angle to said base, a fitting connecting said insulating members at a point spaced from said base, and a third elongated insulating member interposed between said base and fitting at an angle to the plane of said parallel insulating members, said third insulating member being rotatable about its axis and having journalled bearing connection with said base and fitting.

5. An insulator support comprising a base, a pair of insulator stacks mounted on said base and disposed parallel to each other, each stack comprising plurality of insulator units rigidly fixed together, a plurality of cross braces connecting said stacks and rigidly secured thereto, a bearing mounted on one of said cross braces between said stacks, a third insulating stack interposed between said base and bearing, one end of said third stack having a journalled bearing connection with said base, and a shaft secured to the other end of said third stack and journalled in the bearing mounted on said cross brace.

6. An electric switch comprising a base, a pedestal mounted on said base and a switch terminal mounted on said pedestal, said pedestal comprising three elongated insulating members having their lower ends mounted on said base at triangularly spaced points thereon, the upper ends of said elongated members being connected to said switch terminal, two of said insulating members being arranged parallel to each other and in a plane at an angle to the other insulating member.

7. An insulator support comprising a tripod having two parallel legs, the third leg of said tripod being disposed at an angle to the plane of said parallel legs and having its axis intersecting said plane at a point between said parallel legs, and a rigid fitting connecting said legs adjacent the intersection of the third leg with the plane of said parallel legs.

8. An insulating support comprising a base, a tripod mounted on said base and having one end of each leg secured to said base in triangularly spaced relation thereon, two of the legs of said tripod being parallel with each other and disposed in a plane at an angle to the third leg, and a fitting mounted on the other ends of said legs, the legs being connected to said fitting substantially in alinernent with one another.

9. An insulator support comprising a base, a tripod mounted on said base, the ends of the legs of said tripod being arranged in triangularly spaced relation on said base, the legs of said tripod being formed of insulating units rigidly secured together, two of said legs being arranged parallel to each other, braces connecting said parallel legs and rigidly secured thereto, the third leg of said tripod being journalled in said base and intersecting the plane of said parallel legs, a fitting rigidly fixed to said parallel legs, and a journalled bearing in said fitting for said third leg.

10. An insulator support comprising a pair of parallel legs each formed of a plurality of insulating units rigidly connected together, a third leg forming a brace for said parallel legs and disposed at an oblique angle to the plane of said parallel legs and cross braces connecting said parallel legs, said cross braces having surfaces normal to the axes of said parallel legs.

11. An insulator pedestal comprising two parallel legs formed of insulating units rigidly connected together, said legs being disposed at an oblique angle to the horizontal, cross braces connecting said parallel legs at spaced points thereon, each of said braces having upper and lower faces substantially normal to the axes of said parallel legs, said braces being horizontally offset relative to one another, clue to the inclination of said legs to the horizontal so that drip water from one brace will not strike the next lower brace, a fitting connecting the tops of said parallel legs, and a third leg connected to said fitting between said parallel legs and forming a tripod with said parallel legs.

12. An electrical switch comprising a pair of insulating legs having their axes parallel with each other, a fitting connecting said legs, a switch element mounted on said fitting, and a third insulating leg journalled in said fitting and connected with said switch element to operate said element when said third leg is rotated, said third leg being disposed at an oblique angle to the plane of said parallel legs and acting as a brace and forming a tripod with said parallel legs for supporting said switch element.

13. An insulator pedestal comprising a base, two parallel legs formed of insulating material mounted at spaced points on said base, the axes of said legs lying in a plane disposed at an oblique angle to said base, a cross brace rigidly secured to said legs, and a third leg extending between said base and cross brace and being connected to said cross brace between said parallel legs and being arranged normal to said base.

14. An insulator comprising a base, two parallel legs formed of insulating units rigidly connected together, said legs being connected to said base at spaced points thereon and having their axes lying in a plane disposed at an oblique angle to said base, cross braces connecting said parallel legs at spaced points thereon, each of said cross braces having upper and lower faces substantially normal to the axes of said parallel legs,

a fitting connecting the ends of said legs opposite a said base, and a third leg comprising a plurality of insulator units rigidly connected together, said third leg being mounted on said base and having its axis extending normal to said base and having one end thereof connected to said fitting at a point between said parallel legs.

15. An electric switch comprising a base, a pair of insulating legs mounted on said base at spaced points thereon and having their axes parallel to each other and disposed in a plane at an oblique angle to said base, a fitting mounted upon the ends of said legs opposite said base, a third insulating leg having one end journalled in said base and having its axis normal to said base, the other end of said third leg being journalled in said fitting, said legs and fitting cooperating to form a pedestal on said base, a switch blade mounted on said fitting, means for rotating said third leg and a connection between said third leg and said blade for operating said blade when said third leg is rotated.

JOHN J. TAYLOR. 

